JP2011256443A - 疲労強度に優れた低弾性率の脊椎固定用チタン合金製ロッド及びその製造方法 - Google Patents
疲労強度に優れた低弾性率の脊椎固定用チタン合金製ロッド及びその製造方法 Download PDFInfo
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- JP2011256443A JP2011256443A JP2010132886A JP2010132886A JP2011256443A JP 2011256443 A JP2011256443 A JP 2011256443A JP 2010132886 A JP2010132886 A JP 2010132886A JP 2010132886 A JP2010132886 A JP 2010132886A JP 2011256443 A JP2011256443 A JP 2011256443A
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- rod
- titanium alloy
- spinal fixation
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
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- Animal Behavior & Ethology (AREA)
- Neurology (AREA)
- Inorganic Chemistry (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Materials For Medical Uses (AREA)
Abstract
【解決手段】 Nb:25〜35重量%、Ta:Nb+0.8Taで36〜45重量%、Zr:3〜6重量%、残余がTiと不可避的不純物とからなるチタン合金を用意し、チタン合金に対して、断面減少率90%以上のスウェージング加工を施した後、時効処理を施すことで、疲労強度が750MPaよりも高く、かつ、弾性率が110GPaよりも低い脊椎固定用ロッドが得られる。
【選択図】図6
Description
用意したチタン合金に対して、断面減少率90%以上のスウェージング加工を施した後、時効処理を施すことで、疲労強度が750MPaよりも高く、かつ、弾性率が110GPaよりも低い脊椎固定用ロッドを製造することを特徴としている。
供試材として、表1に示す組成(重量%)の熱間鍛造丸棒を用意した。この供試材は、Nb:29重量%、Ta:13重量%、Zr:4.6重量%、残余がTiとなるように製造したものであり、製造後の組成の分析結果を表1に示している。また、この供試材は、溶体化処理を施していないものである。
比較例2では、供試材として、実施例1、2と同様に、表2に示す組成の熱間鍛造丸棒を用意し、この供試材に790℃(1063 K)の真空中で1時間(3.6 ks)保持後水冷の溶体化処理を施した。
実際に脊椎固定用ロッドとして用いられているTi-6Al-4V ELI合金製ロッド(Ti64-rodと記す)を用意した。
(実施例および比較例の評価)
実施例1、2および比較例1〜4で得た各ロッドについて、光学顕微鏡および電界放出型走査電子顕微鏡(FE-SEM)により各試料の微細組織を観察した。X線回折(XRD)により各試料の構成相を同定した。
Claims (3)
- Nb:25〜35重量%、Ta:Nb+0.8Taで36〜45重量%、Zr:3〜6重量%、残余がTiと不可避的不純物とからなるチタン合金に対して、断面減少率90%以上のスウェージング加工を施した後、時効処理を施しており、
疲労強度が750MPaよりも高く、かつ、弾性率が110GPaよりも低いことを特徴とする脊椎固定用チタン合金製ロッド。 - Nb:25〜35重量%、Ta:Nb+0.8Taで36〜45重量%、Zr:3〜6重量%、残余がTiと不可避的不純物とからなるチタン合金を用意し、
前記チタン合金に対して、断面減少率90%以上のスウェージング加工を施した後、時効処理を施すことで、疲労強度が750MPaよりも高く、かつ、弾性率が110GPaよりも低い脊椎固定用ロッドを製造することを特徴とする脊椎固定用チタン合金製ロッドの製造方法。 - 前記時効処理は、5時間超、1週間以内とすることを特徴とする請求項2に記載の脊椎固定用チタン合金製ロッドの製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010132886A JP5584898B2 (ja) | 2010-06-10 | 2010-06-10 | 疲労強度に優れた低弾性率の脊椎固定用チタン合金製ロッドの製造方法 |
US12/965,424 US8425567B2 (en) | 2010-06-10 | 2010-12-10 | Spinal fixation rod made of titanium alloy |
US13/850,913 US9034017B2 (en) | 2010-06-10 | 2013-03-26 | Spinal fixation rod made of titanium alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010132886A JP5584898B2 (ja) | 2010-06-10 | 2010-06-10 | 疲労強度に優れた低弾性率の脊椎固定用チタン合金製ロッドの製造方法 |
Publications (2)
Publication Number | Publication Date |
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JP2011256443A true JP2011256443A (ja) | 2011-12-22 |
JP5584898B2 JP5584898B2 (ja) | 2014-09-10 |
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JP2010132886A Expired - Fee Related JP5584898B2 (ja) | 2010-06-10 | 2010-06-10 | 疲労強度に優れた低弾性率の脊椎固定用チタン合金製ロッドの製造方法 |
Country Status (2)
Country | Link |
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US (2) | US8425567B2 (ja) |
JP (1) | JP5584898B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011106339A1 (en) * | 2010-02-23 | 2011-09-01 | K2M, Inc. | Polyaxial bone screw assembly |
WO2013016523A1 (en) * | 2011-07-28 | 2013-01-31 | Synthes Usa, Llc | Orthopedic implants |
US10327818B2 (en) | 2012-06-18 | 2019-06-25 | Bruce Francis Hodgson | Method and apparatus for the treatment of scoliosis |
GB2517643A (en) * | 2012-06-18 | 2015-02-25 | Bruce Francis Hodgson | Method and apparatus for the treatment of scoliosis |
JP7424994B2 (ja) * | 2018-04-13 | 2024-01-30 | タニオビス ゲー・エム・ベー・ハー | 3d印刷用の金属粉末 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001049408A (ja) * | 1999-08-17 | 2001-02-20 | Natl Res Inst For Metals | チタン系アモルファス合金 |
JP2002249836A (ja) * | 2000-12-20 | 2002-09-06 | Toyota Central Res & Dev Lab Inc | 高弾性変形能を有するチタン合金およびその製造方法 |
JP2007517988A (ja) * | 2004-01-08 | 2007-07-05 | メムリー コーポレーション | 超弾性βチタン物品を製造する方法およびその方法によって得られる物品 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60030246T2 (de) * | 1999-06-11 | 2007-07-12 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Titanlegierung und verfahren zu deren herstellung |
US20040241037A1 (en) * | 2002-06-27 | 2004-12-02 | Wu Ming H. | Beta titanium compositions and methods of manufacture thereof |
US7722805B2 (en) * | 2003-12-25 | 2010-05-25 | Institute Of Metal Research Chinese Academy Of Sciences | Titanium alloy with extra-low modulus and superelasticity and its producing method and processing thereof |
-
2010
- 2010-06-10 JP JP2010132886A patent/JP5584898B2/ja not_active Expired - Fee Related
- 2010-12-10 US US12/965,424 patent/US8425567B2/en not_active Expired - Fee Related
-
2013
- 2013-03-26 US US13/850,913 patent/US9034017B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001049408A (ja) * | 1999-08-17 | 2001-02-20 | Natl Res Inst For Metals | チタン系アモルファス合金 |
JP2002249836A (ja) * | 2000-12-20 | 2002-09-06 | Toyota Central Res & Dev Lab Inc | 高弾性変形能を有するチタン合金およびその製造方法 |
JP2007517988A (ja) * | 2004-01-08 | 2007-07-05 | メムリー コーポレーション | 超弾性βチタン物品を製造する方法およびその方法によって得られる物品 |
Also Published As
Publication number | Publication date |
---|---|
US20110307014A1 (en) | 2011-12-15 |
US20130213535A1 (en) | 2013-08-22 |
JP5584898B2 (ja) | 2014-09-10 |
US9034017B2 (en) | 2015-05-19 |
US8425567B2 (en) | 2013-04-23 |
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